Some college applicants discover the cost of careless tweets

College admissions officers increasingly are monitoring applicants' public postings on social networks, with at least some would-be students getting passed over because of inappropriate tweets and Facebook updates, according to a New York Times report. Over-sharing by high-schoolers mirrors the problems faced by some corporate social media users who struggle to rein in overenthusiastic employees, says researcher Charlene Li. "You got to believe that companies would rather not have these [inappropriate posts] go out," Li says.